Needle-loom.



No. 643,878. Patented Feb. 20, |900.

' D. J. MACDONALD.

NEEDLE LOOM.

(Application tled Nov. 1, 1899.) (N0 M0d9| 2 Sheds-Sheet l.

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No. 643,878. PatentedFeb. 20, |900.

D. J. MACDONALD.

NEEDLE Loom.

(Application med Nov. 1, 1899,)

(No Model.) 2 Sheets-Sheet 2.

` mvENroR wn-NE'ssEs"d y /OmZWWm/malv( 97u17/ um BY A7'7'0R/VEYS UNITED STATES PATENT OFFICE.

DAVID JOHNSTON MACDONALD, OF DUNDEE, SCOTLAND.

NEEDLE-LOOM.

SPECIFICATION forming part of Letters Patent No. 643,878, dated February 20, 1900.

Application filed November 1, 1899. Serial No. 735,520. (No model.)

To @ZZ whom t may concern:

Be it known that I, DAVID JOHNSTON MAC- DQNALD, a subject of the Queen of Great Britain and Ireland, and a resident of Dundee, Scotland, have invented certain new and useful Improvements in and Connected with Needles for Looms, (for which I have applied for British Letters Patent No. 7,763, dated April 13, 1899,) of which the following is a specification.

My said invention relates to wetting mechanism of the kind in which the weft is drawn off a bobbin or roll separate from the loom; and it comprises improvements in or modifications of details of the mechanism described in my Patent Specification No. 633,020, dated September l2, 1899. v

My present improvements relate to the arrangement of a selvage-shuttle and the mechanism for actuating the same, also to appliances for taking up the slack of theweft and for controlling its tension.

In order that my said invention and the manner of performing the same may be properly understood,l hereunto append two sheets of explanatory drawings, to be hereinafter referred to in describing my improvements.

Figure l is al plan, and Fig. 2 a sectional front elevation, of parts of a loom, sufficient to show the application of my improvements. Figs. 3, 4, and 5 are enlarged views of the mechanism for actuating the selvage-shuttle. Figs. 6, 7, 8, and 9 are enlarged views of the shuttle and its carrier, and Fig. 10 is an enlarged view of the weft take-up and controlling appliances.

In the drawings the same reference-letters are used to mark the same or like parts wherever they are repeated.

The warp-shedding apparatus of the loom may be the same as in existinglooms, and it is unnecessary to complicate the drawings by showing it.

In carrying out my present invention the wefting mechanism is the same as that described in my earlier specification hereinbefore referred to; but instead of the arrangement of selvage-shuttle described in that specification I employ an oscillating shuttle similar to 'what is used in some kinds of sewing-machines. This shuttle A, Figs. 6 and 7,

is hollow and is made with a central tube A', on which turns a spool B for the selvagethread. .(Not shown.) A spiral spring A2, placed in the tube A', presses on one end of a tension-hoger B', hinged to the tube A', so as to cause the other end to bear on the flange of the spool B when'it is in the shuttle A, and thus apply the requisite tension to the thread.

The degree of tension may be regulated by adjusting a small screw B2, inserted from the opposite side of the shuttle A, so as to cause the screw B2 to bear more or less on the spring A2. To get the spool B into the shuttle A, the tension-linger B' is turned into the position shown by dotted lines in Fig. 7. The'shuttle A is made with two hooks or projections A3 A4, with which engage two pins O' O2 on a driving-carrier O, Figs. 8 and 9, in the form of a disk having a spindle C3. The shuttle A, with its carrier O, is held in a case D, Figs. 3, 4, and 5, Xed to the lathe D', the spindle C3 projecting through one side ofthe case and having on its outer end a bevel-wheel D2, which gears with a bevel-wheel D'3 on the upper end of a vertical spindle E, carried by the lat-he D'. The vertical spindle E has on its lower end a pinion E', gearing with a spurwheel E2, which is on a stud E3 and which has an eccentric-pin F projecting down from it and carrying an antifriction-roller which is acted on by a cam-slotF' in a plate F2, fixed to the breast-beam F3. As the lathe D' moves forward and backward the gearing and slotted plate hereinbefore described cause the shuttle A to oscillate or reciprocate angularly in the required manner, so that the hook A3 on the shuttle A, which projects through' an opening in the front of the case D, will engage in the loop of weft passed through and emerging from the shed, as described in my earlier specification hereinbefore referred to.

In order to prevent the ou ter thread or side of the weft-loop from being improperly acted on by the shuttle A, there descends into the loop (just before the shuttle carries the inside thread of the loop around) a vertical iinger G, which is D-shaped near the point, this D-shaped part keeping back the outer thread of the loop until the slack of the weft requires to be taken up, as hereinafter described, when the finger G rises clear. The

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vertical finger G slides in a guide G', formed for it in the front of the lathe D', the upper end of the finger being forked and carrying an antifriction-roller G2, which runs on a cam-shaped guide-bar G3, fixed to the breastbeam F3, so that as the lathe D' moves the finger G will rise and fall, as described.

The appliances for taking up the slack of the weft and for controlling its tension are shown more fully in Fig. l0. The weft H passes from the bobbin or roll H' up to and overa guide-bar H2, on which itis pressed by a weighted tension-lever H3. The weft H proceeds thence to a guide-eye J in the bottom of one leg of a vertical slotted or twolegged stationary bar J', and between the two legs it passes through a guide-eye J2 in a piece J3, which slides between the legs and has on it an antifriction-roller J4. The weft passes from the guide-eye J2 to agnide-eye J5 in I[he bottom of the other leg of the bar J'. The roller J4 is in a cam-shaped guide-slot K in a bar K', fixed to and projecting back from the lathe-rail D', and as the lathe beats up the slot K in the bar K raises the sliding piece J 2 in the slot of the stationary bar J' and takes up the slack of the weft H. At the same time a cord K2, attached to the sliding piece J3 and passing over guide-pulleys K3 K4, becomes slack and allows the weighted tension-lever H3 to bear fully on the Weft H, thus insuring that while the slack of the weft is being taken up additional weft is prevented from being drawn from the supply at the back. Vhen the lathe D' moves back, the cord K2 is tightened, so as to lift the weighted tensionlever H2 and allow the weft to be drawn with diminished tension. The weft H passes on- Ward from the guide-eye J5 in the stationary bar J' to a guide-eye in a small block L, iitted to slide on a vertical rod L', fixed to the back of the lathe D', and thence to the wefting mechanism described in my earlier speciication, hereinbefore referred to. This sliding guide L by its weight bears down slack weft and prevents it from looping and becoming entangled.

This improvement is of advantage in weaving narrow fabrics.

What I claim as my invention is- 1. In connection with wetting mechanism for looms, the combination of a lathe, an oscillating selvage-shnttle having a hook or projection, a driving-carrier therefor and a containing-case fixed to the lathe, with a stationary cam-plate and gearing connecting said carrier with the cam-plate to cause the shuttle to oscillate bythe backward-and-forward movement of the lathe, substantially as described.

2. In connection with wefting mechanism for looms, the combination of a lathe, an oscillating selvage-shuttle having a hook or projection, a driving-carrier therefor and'a containing-case fixed to the lathe with means for oscillating the shuttle by the backwardand-forward movement of the lathe and a moving finger G to engage the weft-loop, suhstantially as described.

3. In needle-looms, appliances for taking up the slack of the weft and for controlling its tension, consisting of a guide-bar for the weft, and a weighted tension-lever bearing on the weft passing over the bar, in combination with a two-legged stationary bar having guide-eyes in their lower ends and a sliding piece working between the legs, the sliding piece having in it a guide-eye, a cord connecting the sliding piece to the weighted tonsion-lever, and the lathe having a cam-bar to act on the sliding piece, and also having a vertical rod with a slidinggnide-eye, all substantially as herein set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

DAVID JOHNSTON ilIACDONALD.

Witnesses:

WILLIAM CHILTON, WILLIAM YOUNG. 

